Blend all ingredients in a blender until smooth. Add water as needed. Add cinnamon and ginger, as much as you want. You can add pumpkin pie spice instead of the cinnamon and ginger if you have it.
Stevia is a South American herb that has been used as a sweetener by the Guarani Indians of Paraguay for hundreds of years. Recipe called for 1 pack - I guessed at pack size at 1 gram after searching online for info.